Blackboard-eraser



UNITED STATES PATENT OFFICE.

HARRY O. GOODRICH, OF CHICAGO, ILLINOIS, ASSIGNOR TO THOMAS KANE 8n COMPANY, OF ILLINOIS.

BLACKBOARD-ERASER.

SPECIFICATION forming part of Letters Patent No. 388,555, dated August 28, 1888,

Application filed June 19, 1888. Serial No. 277,508. (No model.)

To all whom it may concern.-

Be it known that I, HARRY 0. (Romance, of Chicago, in the county of Cook and State of Illinois, have invented certain Improvements in Blackboard-Erasers, of which the following is a specification.

This invention relates to erasers designed especially and particularly for use in connection with blackboards. Its object is to provide a simple and inexpensive device, the rubbing-surface of which may be reversed or speedily renewed at a trifling cost; and it consists in the combination of a block or body, a removable strip of felt applied to its face,and peculiar devices for securing the felt thereto.

In the accompanying drawings, Figure l is a perspective view of my devices in operative condition. Fig. 2 is a similar view with the covering detached.

Referring to the drawings, A represents a block of wood, preferably of rectangular form, having a flat surface, a.

B B are two metal stirrups or clasps of U form attached to the side of the block near opposite ends by pivots 11, each stirrup being adapted to swing upward, as in Fig. 2, or to turn downward closely around the end of the block, as in Fig. 1.

G represents a strip of felt of a width corresponding with the face of the block and of a length somewhat greater. This strip is applied to the face of the block, with its ends projected through and beneath the upturned clasps, as shown in dotted lines in Fig. 1,after block with chalk, it may be detached and reversed to allow the opposite side to be used.

The parts are so proportioned that when the clasps are turned down to their operative position they will bear with considerable pressure, and thus be retained firmly in position, so that they will act in turn to securely hold the end of the felt.

Having thus described my invention, what I claim is The herein described blackboard eraser, consisting of the block or body A, the two U- shaped clasps pivoted to its ends, and the facing of felt material applied to and bent over the ends of the block and confined against the ends by the clasps, as described and shown.

In testimony whereofIhereunto set my hand, this 29th day of May, 1888, in the presence of two attesting witnesses.

HARRY G. GOODRIOH.

Witnesses:

JNO. A. KBEUSER, Jr., J. L. MoAnoW. 

